Using Messenger on iPad

I downloaded Messenger for a friend onto her iPad because she was prompted when she received some messages in Facebook. We re-booted her iPad, opened Messenger, got prompt to continue as her, then got [this screen](https://i.imgur.com/vbgZVCg.jpg). Everytime we tried. The little arrow on the left bounces, but does nothing when tapped. This is what we get whether opening the app from FB or Messenger. Anyone ever see this? Know a fix? Thanks.

Edit: I was able to open her Messenger on my Android phone, and she could read her messages.